from flask import abort, jsonify
from flask import current_app
from flask import g
from flask import render_template
from flask import request
from flask import session

from info import constants, db
from info.models import News, User, Comment, CommentLike
from info.modules.news import news_blu
from info.utils.common import user_login_data
from info.utils.response_code import RET


@news_blu.route('/followed_user', methods=["POST"])
@user_login_data
def followed_user():
    """关注或者取消关注"""
    # 获取自己的登录信息
    user = g.user
    if not user:
        return jsonify(errno=RET.PARAMERR, errmsg="未登录")
    # 获取参数
    user_id = request.json.get("user_id")
    action = request.json.get("action")

    if not all([user_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in("follow", "unfollow"):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    # 查询数据
    try:
        other = User.query.get(user_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not other:
        return jsonify(errno=RET.NODATA, errmsg="未查询到数据")

    # 当前当前用户的关注列表调价一个值
    if action == "follow":
        if other not in user.followed:
            user.followed.append(other)
        else:
            return jsonify(errno=RET.DATAEXIST, errmsg="当前用户已经被关注")
    else:
        if other in user.followed:
            user.followed.remove(other)
        else:
            return jsonify(errno=RET.DATAEXIST, errmsg="当前用户未被关注")

    return jsonify(errno=RET.OK, errmsg="OK")



@news_blu.route('/comment_like', methods=["POST"])
@user_login_data
def comment_like():
    """
    点赞和取消点赞
    :return:
    """
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")

    # 1 取到请求的参数
    comment_id = request.json.get("comment_id")
    news_id = request.json.get("news_id")
    action = request.json.get("action")
    print(comment_id,news_id,action)

    if not all([comment_id, news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ["add", "remove"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        comment_id = int(comment_id)
        news_id = int(news_id)

    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not comment:
        return jsonify(errno=RET.NODATA, errmsg="评论不存在")

    if action == "add":
        comment_like_model = CommentLike.query.filter(CommentLike.user_id == user.id, CommentLike.comment_id == comment.id).first()

        if not comment_like_model:
            comment_like_model = CommentLike()
            comment_like_model.user_id = user.id
            comment_like_model.comment_id = comment.id
            db.session.add(comment_like_model)
            comment.like_count += 1

    else:
        comment_like_model = CommentLike.query.filter(CommentLike.user_id == user.id, CommentLike.comment_id == comment.id).first()
        if comment_like_model:
            db.session.delete(comment_like_model)
            comment.like_count -= 1

    try:
        db.session.commit()
    except Exception as e:
        db.session.rollback()
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据库操作失败")

    return jsonify(errno=RET.OK, errmsg="OK")


@news_blu.route('/news_comment', methods=['POST'])
@user_login_data
def comment_news():
    """
    评论
    :return:
    """
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")
    # 1 取到请求参数
    news_id = request.json.get("news_id")
    comment_content = request.json.get("comment")
    # 通过parent_id找到间接回复的上级
    parent_id = request.json.get("parent_id")

    # 2 判断参数 parent_id 是间接的回复
    if not all([news_id, comment_content]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    try:
        news_id = int(news_id)
        if parent_id:
            parent_id = int(parent_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    # 查询新闻， 并判断新闻是否存在
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查寻到新闻数据")
    # 3 初始化一个评论模型，并赋值
    comment = Comment()
    comment.user_id = user.id
    comment.news_id = news_id
    comment.content = comment_content
    if parent_id:
        comment.parent_id = parent_id

    # 4 添加到数据库
    #  为什么要自己返回数据库 因为return 的时候要用到comment的id

    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()

    return jsonify(errno=RET.OK, errmsg="成功", data=comment.to_dict())


@news_blu.route('/news_collect', methods=["POST"])
@user_login_data
def collect_news():
    """
    收藏新闻
    1 接收参数
    2 判断参数
    3 查询参数并判断、
    4 收藏

    :return:
    """
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")
    # 1 接受参数
    news_id = request.json.get("news_id")
    action = request.json.get("action")
    # 2 判断参数
    if not all([news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    if action not in ["collect", "cancel_collect"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    try:
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    # 3 查询参数， 并判断新闻是否存在

    try:
        news = News.query.get(news_id)
    except Exception as e:
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")
    # 4 取消收藏
    if action == "cancel_collect":
        if news in user.collection_news:
            user.collection_news.remove(news)
    else:
        #4 收藏
        if news not in user.collection_news:
            user.collection_news.append(news)

    return jsonify(errno=RET.OK, errmsg="OK")


@news_blu.route('/<int:news_id>')
@user_login_data
def news_detail(news_id):
    """
    新闻详情
    :param news_id:
    :return:
    """
    user = g.user

            # 右侧的新闻排行 news_list 是一个对象
    news_list = []
    # 这个列表里面存储的是六个对象[News1, News2,.....]
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)

    # 定义一个空的字典列表，里面装的就是字典
    news_dict_li = []
    # 遍历对象的列表，将对象的字典加到字典列表中 to_basic_dict是转换对象为列表
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())

    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        abort(404)

    news.clicks += 1
    is_collected = False

    if g.user:
        if news in user.collection_news:
            is_collected = True

    # 查询评论
    try:
        comments = Comment.query.filter(Comment.news_id==news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)
    comment_like_ids = []

    if g.user:
        try:
    # 查询当前用户在当前新闻里面都点赞了哪些评论
    # 1 查询出来当前新闻的所有评论
            comment_ids = [comment.id for comment in comments]
            # 2 在查询在当前评论中哪些评论被当前用户所点赞
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids), CommentLike.user_id == g.user.id).all()
            # 3 被点赞的评论id
            comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]
        except Exception as e:
            current_app.logger.error(e)


    comment_dict_li = []
    for comment in comments:
        comment_dict = comment.to_dict()
        comment_dict["is_like"] = False
        if comment.id in comment_like_ids:
            comment_dict["is_like"] = True
        comment_dict_li.append(comment_dict)

    is_followed = False
    # if当前新闻有作者，当前登陆用户已经关注过这个用户
    if news.user and user:
        # followed代表我关注了谁  代表登陆的人关注了这个新闻的作者
        if news.user in user.followed:
            is_followed = True

    data = {
        "user": user.to_dict() if user else None,
        "news_dict_li": news_dict_li,
        "news": news.to_dict(),
        "is_collected": is_collected,
        "comments": comment_dict_li,
        "is_followed": is_followed
    }
    return render_template("news/detail.html", data=data)